Question

What makes the core of the Earth denser than the mantle?

a. because the inner core is solid, and the mantle is semi-solid
b. because the core is metallic iron and nickel which are denser than the materials than in the mantle
c. because the mantle isn't as hot as the core

Answer 1

The answer is letter b

Answer 2

because the core is metallic iron and nickle which are denser than the material than in the mantle